Fixed broken links.
Merge pull request #47 from hughlv/feature/fix_1

Fixed broken links.
css sprite 1px problem / logo position
Merge pull request #48 from SunLn/nav_height_small_icon

css sprite 1px problem / logo position
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature/newdocs